Doorstop



Feb. 21, 1933. H. M. wHlTcoMB DOORSTOP Filed Sept. 14, 1928 TIG. 2.

INVENTOR 5 Harris M.Wl\itcofn-\L ATTORNEY Patented Feb. 21, 1933 UNITED STATES rara HARRIS MORGAN WHI'ICOMB, OF ALBANY, WISCONSIN, ASSIGNOR i'O ALBANY HARD- WAR-E SPECIALTY MANUFACTURING COMPANY, OF ALBANY, WISCONSIN, A COR- ronArIoN on WISCONSINY DOORSTOP Application filed September 14, 1928. Serial No. 305,934.

The present invention relates to door stops of the type employed for retaining swinging closure members in open position and has for its object to provide a door stop of simple and inexpensive construction which will act to positively retain a closure member such as a garage door in open position against wind pressure.

A further object of the invention is to provide a door stop which is automatically latchedin its retaining position when the door is .swung to full open position and which can be quickly'and easily released to permit closing of the door.

With the above and other objects in view, the invention may be said to comprise the device as illustrated in the accompanying drawing heretofore described and particularly set forth in the appended claims, together with such variations and modifications thereof as willbe apparent to one skilled in the art to which the invention appertains.

Reference should be had to the accompanying drawing in which: f

Figure 1 is a horizontal section taken above the door` stop looking down upon the door stop, the door and stop being shown in full lines in closed position and in dotted lines in open position.

Fig. 2 is a side elevation of the door and door stop.

Fig. 3 is a section taken on the line indicated at 3 3 in Fig. 1.

Fig. 4 is a section taken on the line indicated at 4-4 in Fig. 1`.

Fig. 5 is a section taken on the line indicated at 5-5 in Fig. 1.

Fig. 6 is a detail view showing a modified form of pivotal connection between the stop bar and lintel bracket.

Fig. 7 is a detail view showing a modified form of pivotal connection between one of the bars and its bracket.

In the accompanying drawing7 the invention is illustrated as applied to an outwardly swinging door such as a garage door, the structure in whichthe door is mounted being indicated by the numeral 17 the swinging door by the numeral 2 and the hinged connection between the door and structure by the numeral 3. Attached to the lintel of the door frame, there is a4 U-shaped bracket i which has laterally extending flanges 5 which are secured to the lintel by means of screws 6, the web 7 of the bracket being spaced be; neath the under face of the lintel. Attached to the inner face of the door, there is an anglebracket 8 which has one flange secured to the face of the door by means of screws 9 and a horizontally disposed flange 1() projecting outwardly from the door. An angle bar 11 having a horizontally disposed flange 12 and a vertical depending iiange 13 is pivotally attached to the under face of the bracket i byrmeans of a pivot pin 14: in the form of a rivet which passes through the web 7 of the bracket and the flange 12 of the angle bar which bears upon the web 7 of the bracket. An angle bar 15 having a horizon- Vtal flange 16 and a depending vertical flange 13 is pivote-.ily secured Vto the projecting flange 10 of the bracket 8 by means of a pivot pin 18 in the form of a rivet extending through the flange 10 of the bracket and the flange 16 of the angle bar which bears upon the under side of the flange 10. The angle bars 11 and 15 are thus pivotally connected at their outer ends to the brackets 4 and 8 and these bars are also pivotally connected together at their inner ends by means of a pivot pin 19 in the form of a rivet passing through the flanges 12 and 16 of the two bars. The pivot pin 19 is preferably provided with a spring washer 20 at one end to take up wear between the bars and to yieldingly press the ends of the bars together.

.The angle bar 15 is of somewhat larger size than the angle bar 11 and when the angle bars are in the extended position shown in dotted lines in Fig. 1, the inner end of the bar 11 lies within the angle of the bar 15. The pivot pin 19 is spaced some distance from the end of the bar 15 and is adjacent the end of the bar 11, so that in the extended position, the inner end of the bar 15 overlaps the bar 11 inwardly ofthe pivot 19. The pivot pin 19 is near enough to the end of the bar 11 to permit the end of the bar 11 to swing between the pivot pin and the flange 17 of the bar 15 to permit the bars to fold from the position shown in dotted lines in Fig. 1 to the position shown in full lines in said figure. rllhe pivotpin 19 is also spaced from the flange 17 of the bar 15 a distance somewhat greater than the distance from the pivot to the outer face of the flange 13 of the bar 11 so that when the door is swung to open position, the bars 11 and 15 are permitted to swing slightly past the position in which they aline with each other, positioning the pivot 19 slightly past its dead center position, i. e., outwardly of a straight line connecting the pivots 14; and 18. rllhe outward movement of the pivot 19, however, is limited by the engagement of the flange 13 of the bar 11 with the inner end of the flange 17 of the bar 15. Assuming that the bars 11 and 15 have been moved to their limit of movement with the bar 11 engaging the end of the flange 17 and the pivot 19 past its dead center position, pressure on the door tending to close the same will exert a thrust on the pivot 19 tending to move the pivot outwardly. rl`his movement, however, is prevented by the flange 17 of the bar 15 so that the door is positively held against closing movement.

In order to cause the pivot pin 19 to be automatically shifted past its dead center position, when the door is opened, the flange 16 of the bar 15 with which the bar 11 engages, is provided along the outer edge thereof at its inner end with a short downwardly projecting tapering or rounded rib 21 which bears against the top face of the bar 11 as the bars 11 and 15 approach a position of alinement. The opening movement of the door will swing the bars 11 and 13 to a position in which the pivot pin 19 is in line with the pivots 14 and 18. In this position of the bars, the rib 21 by reason of the fact that the flange 16 is wider than the bar 11 and by reason of the offset position of the rivet 19, on the flange 16, will project partially past the outer edge of the flange 12 ot' the bar 11 and due to the pressure exerted, the rib 21 on the flange 12 due to the spring washer 20 and the resiliency of the bars, the edge of the bar 11 will exert an outward pressure on the rib 21 which will automatically cause an outward movement of the bars 11 and 15 and of the pivot 19, past the dead center position, bringing the flanges 13 and 17 of the bars into engagement at the end of the flange 17, so that the door is positively held against closing movement until the pivot 19 is again moved to position inwardly of its dead center position.

A very simple device is thus provided for automatically shifting the pivotal connection between the stop bars past the dead center position to positively hold the door against closing movement and this same device serves to yieldingly latch the bars in their door retaining position so that they will not be accidently shifted out of retaining position.

In order to break the joint between the bars 11 and 15 to permit closing of the door, a cord 22 may be attached to the bar 15 and extend through a staple 23 secured to the inner side of the door. By exerting a pull on the cord 22, the bars will be swung inwardly to break the joint so that the bars will collapse as the door is pushed toward closed position.

In Fig. 6 of the drawing, there is shown a modified form of pivotal connection between the lintel bracket and the stop bar attached thereto, this form of pivotal conne@ tion being designed to facilitate the attachment of the stop device to the door and lintel so that the bars will occupy the proper positions with respect to the door and lintel when the door is in closed position. If the stop device is carelessly applied, the stop bars may occupy a position too close to the face of the door or too far inwardly from the face of the door in the closed position of the door. The stop device should be so applied that the bar 11 lies substantially parallel with the face of the door when the door is in closed position, as shown in Fig. 2. In the modification shown in Fig. 6, the pivotal connection between the lintel bracket la and the stop bar 11a is formed by a pair of spaced pins 24 and 25 secured to the bar 11a and projecting through relatively inclined slots 26 and 27 in the bracket. During the pivotal movement of the bar 11, the pins 24 and 25 slide in the slots 26 and 27, the slot 26 being parallel with the face of the door and the slot 27 at an inclination thereto, the pins moving from one end of each slot toward the opposite end during the pivotal movement. The inner end of the slot 27 is in alinement with the slot 26 so that the inward limit of movement of the bar 110J is in a position parallel with the door in its closed position. By attaching one of the brackets, the proper position for the other bracket may be accurately determined by closing the door and swinging the bar 11a to its inner limit of movement with respect to the lintel bracket and parallel with the door.

In Fig. 7 of the drawing7 there is shown a connection between one of the pivoted bars and its bracket which permits play between the bar and bracket so that if either the lintel or door bracket should be attached to one side or the other of its correct position, the bars will have sucient play in the closed position of the door to prevent the stop bars from interfering with the final closing movement of the door. In this modification, one of the brackets is provided with a longitudinal slot 28 in which the bar pivot may slide, and this slotpermits the bars 11 and 15 to have a limited swinging movement independently of the door when the door is closed. If the bracket were attached too close to the free edge of the door, the inner ends of the bars connected by the pivot pin 19 might engage the door as it approaches closed position and interfere with the iinal closing movement thereof. The

pin and slot connection, however, permits the bars to have a free pivotal movement independently of the door so that such interference is avoided even though there be considerable error in the positioning of the stop supporting brackets on the door and lintel.

In case it is desired, the flat spring 29 may be added as shown, secured in place by the screws 30 and this will yieldably force the bars 13 and 15 past the dead center position, the constant pressure against bar 15 will positively prevent any possibility of a vibrating motion of the door from a wind jerking the bars past dead center into a closing position, in addition the spring assists the bars in straightening out.

What I claim is:

1. The combination with a building structure having an opening and a swinging closure member for the opening, of a stop device comprising a pair of bars pivotally connected at their inner ends, brackets attached to said structure and closure member respectively, pivotal connections between the outer ends of said bars and the respective brackets, the pivotal connection between the bracket attached to the structure and the bar attached thereto comprising a pair of spaced pins attached to the bar and angularly disposed slots in the bracket in which the pins slide and which limit the inward movement of the bar to a position parallel with the closure member in its closed position.

2. A stop device comprising a pair of bars pivotally connected at their inner ends and adapt-ed to be pivotally connected at their outer ends to a door and door casing, respectively, one of said bars having a flat face and a flange projecting from said face along one side at its inner end and an integral tapering projection extending from said flat face in the same direction as the flange on the side edge opposite the flange and adjacent the inner end of the bar, said bar having a pivot pin opening spaced from its inner end and laterally of said side flange, the other bar havinOF an inner end portion of a width to be received between said projection and flange and having a pivot pin opening closely adjacent its inner end'and spaced from the side edge 

